Question: Find the critical t-value for constructing a condence interval for a population mean at the given level of condence for the given sample size,n. (a)

Find the critical t-value for constructing a conﬁdence interval for a population mean at the given level of conﬁdence for the given sample size,n.
(a) 99% conﬁdence;n = 18
(b) 90% conﬁdence;n = 27

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